CN104921696A - Dissection-type video pharyngoscope - Google Patents

Abstract

The invention discloses an anatomical video laryngoscope. The main body of the lens is semicircular, the lower left side of the lens is folded inward toward the center of the circle and extended, and the upper part has a short extension beyond the semicircular end. The left side of the semicircle connecting the extension is the lens end, and the direction is vertically downward. The angle between the lower part of the extension and the vertical line at the left end of the semicircle is > 30 degrees, the length is < 50 mm, and there is an arc-shaped inward protrusion at the end. The intersection angle between the extension line of the extended part below and the tangent line at the apex of the semicircle is ≤60 degrees. The diameter of the semicircle varies from 60mm to 120mm depending on the model. The mirror body is divided into two parts, front and rear, the width of the front and rear is <23mm, and the rear part is a closed video lens insertion slot, the width of which is <8mm. The front part is the guide groove for the tracheal tube, with a width of <15mm. From the right side, the upper part and the outer part are open, showing an "L" shape, gradually expanding to the upper left side and covering to the same width as the lower part, and pressing down through the end of the lens, showing an open outer part "C" shape. This design is close to the actual oropharyngeal anatomical radian, and provides special structural conditions for exposing the glottis and accurately guiding and placing the tracheal tube.

Description

Anatomical video laryngoscope

technical field

Relating to medical visualization devices for exposing glottis-guided endotracheal tubes for endotracheal intubation.

Background technique

The application of video laryngoscope provides a safer and more effective method for endotracheal intubation, especially difficult endotracheal intubation. At present, several common devices have certain usage restrictions. For example, the price is too high, and it is difficult for general hospitals, especially primary hospitals. Burden; the operation in the natural position is not convenient enough, and the general doctor needs to have the foundation of endotracheal intubation technology and can master it after many times of practice; It is often difficult to judge and adjust, and it is often difficult to coordinate hand-eye coordination during operation, which makes it difficult to place an endotracheal tube, especially for those who are inexperienced.

Some plastic observation endoscopes can be molded to conform to the actual anatomical radian, but they have poor fixation support and are easy to deform. It is difficult to maintain the ideal anatomical radian in actual operation. exact location.

At present, the fixed-shaped lens type video laryngoscope, the shape of the lens is not close to the actual anatomical curvature of the oropharynx. When exposing the throat, it is still necessary to adjust the head position and use a large pulling force. It is often difficult to accurately control the position of the head end when the catheter is inserted. ; Or the exposure shows that the throat is easy, but there is no guide groove for easy adjustment of the catheter position, making catheter insertion sometimes difficult.

Contents of the invention

The technical problem to be solved by the present invention is to provide a video laryngoscope that is closer to anatomy. Because the natural shape of the upper respiratory tract from the incisors to the glottis in the oral cavity is similar to a fishhook, according to the specific anatomical form of the oropharynx, the present invention is designed as It can be as close as possible to the actual oropharynx anatomical radian without adjusting the head position. After the lens is placed in the oral cavity, it can easily reach the throat and expose the glottis without special forceful pulling; the tracheal tube guide groove can guide the tracheal tube into the lens field of view. The difference from the existing products is that, in addition to the vertical direction, if necessary, the lateral direction also has a relatively sufficient ability to adjust the position of the endotracheal tube, which is convenient for accurate placement of the tube. The "L" shape design of the right part can make the volume smaller, reduce the limitation of the lens body by the lips and teeth after being placed in the oral cavity, increase the movement range of the lens body inside and outside the oral cavity, and facilitate accurate adjustment of the lens position at the lens end; there is a distance from the lens to the top of the lens. Sufficient distance guarantees sufficient imaging depth of field and imaging range, which can prevent the lens from being blocked by tissues, so that the field of view has no image and affects the observation positioning.

In order to solve the above technical problems, the present invention provides an anatomical video laryngoscope with a special angle and a special guide groove. The lens body is semicircular and folded inward on one side. The inner diameter of the circular mirror body is between 60mm and 120mm according to different models, the left side is the lens end, and the right side is the lens insertion end. The lens body is divided into two parts, front and rear, with a width of <23mm. The rear part is the groove for inserting the video camera lens with the opening on the right side and the rest is closed, with a width of <8mm. , the top and outside of the right side are open in an "L" shape, and gradually expand and cover the top left side, with the same width as the bottom, cross the lens end <10mm and press down, forming a "C" shape with a completely open outside.

The beneficial effect of the present invention is that: the comprehensive consideration of the shape can not only be close to the anatomical radian of the natural mouth and throat to the greatest extent, but compared with the existing fixed-shaped visual laryngoscope, the bending angle is larger, and it can be inserted through the oral cavity under the natural head position. Slide along the tongue to the throat to easily expose the glottis; the specially designed guide groove facilitates the accurate placement and position adjustment of the endotracheal tube. Put the endotracheal tube obliquely in the direction of the "L" guiding groove and push it forward to accurately control the catheter in the guiding groove. After the catheter is drawn out through the guiding groove, it is consistent with the central axis of the lens field of view, and the endotracheal tube can be accurately placed into the trachea. If the catheter is not accurately aligned with the glottis after being placed in the guide groove, the lateral movement of the catheter is not restricted because the outside of the guide groove is completely open, that is, the lateral movement can be made within a certain range, so it is easy to adjust the position of the catheter tip to align with the glottis And placed into the glottis into the trachea. After the tracheal tube is inserted into the trachea, the lens is withdrawn along the curvature of the oropharynx, and the side can be separated from the tracheal tube without hindrance. The curved inward protrusion at the top of the lower left side of the lens can reduce the obstruction of the soft tongue during insertion, making it easier for the lens to slide into the throat. The angle between the structure of the surrounding part of the lens end and the inwardly folded extension part, as well as the relative vertical and horizontal distances, not only help the exposure of the glottis, but also facilitate the accurate guidance of the endotracheal tube into the glottis.

The imaging system with the light source is made into the lens part of the same shape as the video device insertion slot. The lens handle is designed to be centrifugal, and the whole is spoon-shaped. The mirror handle is blocked for easy operation. Wired or wirelessly connected to a monitor, the lens head can be inserted into the lens for use. Also video device part and eyeglass can be made portable all-in-one mirror.

Description of drawings

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the front view of the lens structure described in the embodiment of the present invention

Figure 2 is a cross-sectional view of the longitudinal separation plane of the front and rear two-part structure according to the embodiment of the present invention

Figure 3 is a top view of the endotracheal tube guide groove of the lens according to the embodiment of the present invention

Fig. 4 is a side view of the spoon-shaped video device with handle according to the embodiment of the present invention

Detailed ways

As shown in Figures 1 to 4, the lens body of the present invention is in the shape of a semicircle and the left side is folded inward at 30 degrees to the center of the circle, and the connecting part is rounded. Fold and extend the lower left side toward the center of the circle. The left side of the semicircle connecting the extension part is the lens end, and the lens direction is vertically downward. The angle between the extension and the vertical line at the left end of the semicircle is > 30 degrees, the length of the extension is < 50 mm, and there is an arc-shaped inward protrusion at the end facing away from the center of the circle. The intersection angle formed by the extension line of the extension part and the tangent line of the apex of the semicircle is ≤60 degrees. The diameter of the semicircle varies from 60mm to 120mm depending on the model. The mirror body structure is divided into two parts, the front and rear width <23mm, the rear part is a closed video camera lens insertion groove, width <8mm (Figure 2), the front part is the endotracheal tube guide groove, width <15mm, the right side From the top, the outside is open, showing an "L" shape, gradually expanding and covering the left side, passing through the lens end and pressing down with the bottom, forming a "C" shape with an open outside (Figure 3), the height of the top and bottom is the same <18mm ( figure 1).

The present invention combines and utilizes the commonly used digital optical technology to make an electronic imaging system with a light source into a video device of the same shape as the video device insertion groove. The video device and the lens can be made into one body, which can be sterilized and used repeatedly; it can also be made into a separate type. When in use, the video device lens part is inserted into the closed video device lens insertion groove, and the lens is used for one time (Figure 1). The video device and the monitor can be wired or wirelessly connected to form a portable video display system.

The shape of the lens body is closer to the actual anatomical radian, and the angle formed by the connection line of the extension part and the tangent line of the top of the semicircle is ≤60 degrees, which can make the lens have a smaller inner angle than existing products at the same depth of insertion in the oral cavity. It is completely attached to the axis of the mouth, pharynx and larynx of the natural anatomy, and the curvature of the mirror body is more in line with the natural anatomical angle of the upper airway oropharynx. The lens body enters along the natural anatomical radian without excessive lifting, so that the lens can be aimed at the glottis and visualized. The semi-open guide groove allows the catheter to enter along the "L"-shaped corner of the guide groove and close to the lens to be sent out at the front exit of the guide groove. The position of the tip end of the endotracheal tube can be precisely adjusted vertically and horizontally through a relatively sufficient rotation movement, which avoids the difficulty in placing the endotracheal tube due to the difficulty in adjusting the direction of the tip end of the endotracheal tube accurately even if the glottis is exposed satisfactorily with other types of video laryngoscopes. The left end of the lens has a raised inward protrusion, which helps to reduce the obstruction of the soft tongue when the lens is inserted, facilitates sliding over the tongue, and reduces insertion damage. The distance between the lens tip and the lens head is >30mm, and the support of the lens groove can ensure that the lens has sufficient imaging depth of field, and will not be covered by tissue, which will cause imaging failure and affect continuous observation. It can also be appropriately enlarged or reduced on the basis of the above dimensions to make different models.

Description of the operating method of the present invention:

Put the lens end of the lens into the oral cavity. Since the curvature of the lens is completely designed according to the natural anatomical curvature, as long as the lens can be inserted through the mouth, the head end of the lens can be placed on the glottis without adjusting the head position. The head end and each side edge of the lens are noninvasive spherical surfaces, and the head end is flat, thereby reducing damage and irritation that may be caused thereby and facilitating noninvasive placement. The curvature of the lens body is consistent with the anatomical curvature of the oral cavity, palate, and throat. Under the uninterrupted and continuous guidance of the monitor image, the lens can slide into the throat close to the tongue and follow the anatomical curvature after entering the oral cavity. As a reference for insertion, the inner protrusion of the lens is placed in the epiglottic valley, and the glottis can be fully exposed by lightly lifting the epiglottic cartilage. Because it is a hard mirror body, it has good fixing and supporting force, and the distal position is easy to control and adjust at any time. After the glottis is exposed, fix the mirror body, put the endotracheal tube obliquely close to the "L"-shaped corner of the guide groove, and then naturally send it forward into the entrance of the left "C"-shaped part of the guide groove until the end of the lens is drawn out. The endotracheal tube was placed into the glottis under the guidance of the monitor image. If necessary, the direction can also be adjusted by pushing and rotating the tail of the catheter to align and place the endotracheal tube into the glottis. Rotating the tail end of the endotracheal tube can make the head end of the tube have a lateral movement range of more than 2 cm, which is very beneficial to accurately adjust the direction of the tube. Control the insertion depth of the catheter into the trachea, withdraw the lens along the arc, the catheter and the lens body can be separated without hindrance at the side of the semi-open endotracheal catheter guide groove, and the endotracheal intubation can be easily completed.

The shape of the present invention comprehensively considers not only being close to the actual oropharynx anatomical radian to the greatest extent, but also facilitating the insertion and withdrawal of the mirror body and the tracheal tube. During the insertion process of the lens, continuous and uninterrupted display and non-invasive insertion are guaranteed, blind estimation is avoided, and the top position can be adjusted accurately at any time. The continuously displayed tissue structure is the reference for position adjustment. The endotracheal tube guide groove on the left side of the lens can effectively fix the tip of the guide tube, and can precisely adjust and control the position of the tip of the tube through the rotation and movement of the tail end of the tube, so that the tube can be placed without any problems. difficulty.

The curvature design of the lens is closer to the actual anatomical curvature, and the fit is better. When the lens is placed, there is no need to adjust the head position, and the glottis can be easily exposed without a large pulling force, further reducing damage and stimulation to the tissue. Compared with the current types of video laryngoscopes, the same insertion depth can produce a naturally smaller internal angle (the internal angle between the oral axis and the laryngeal axis), which is especially beneficial to the glottis exposure of patients with a high larynx.

In the present invention, the laryngopharyngeal lens is designed with medical hard materials such as stainless steel, plexiglass, plastic, etc., and is closer to the actual anatomy of the upper respiratory tract. At the same time, comprehensive consideration is more conducive to the display of the throat, and it is convenient for the insertion of the lens and mirror body. After the position adjustment, there is enough space for the placement of the endotracheal tube. The tip of the lens is flat, making it easier to insert into the mouth.

The invention is not limited to the embodiments discussed above. The above description of specific implementations is intended to describe and illustrate the technical solutions involved in the present invention. Obvious changes or substitutions based on the teachings of the present invention should also be deemed to fall within the protection scope of the present invention. The above specific implementation manners are used to reveal the best implementation method of the present invention, so that those skilled in the art can apply various implementation manners and various alternative modes of the present invention to achieve the purpose of the present invention.

Claims (7)

1. An anatomical non-invasive video laryngoscope. The lens of the mirror body is semicircular in shape and the lower left side is folded inwardly towards the center of the circle > 30 degrees to extend, and the left end of the semicircle is the lens end. 2. As claimed in claim 1, the inner diameter of the semicircle is between 60mm and 120mm according to different models, and the height is <18mm; the length of the lower extension is less than 50mm, and the end is a small arc-shaped inward protrusion facing away from the center of the circle, and the upper extension is less than 10mm. 3. As claimed in claim 1, the angle formed by the extension line of the inwardly folded part and the tangent line of the apex of the semicircle is ≤ 60 degrees, and the extension part and the connecting part of the semicircle form a small rounded corner. 4. As claimed in claim 1, the semicircular part of the lens is divided into two parts, the front and rear, with a width of <23mm, the rear part is a closed video device lens insertion groove with an opening at the right side, and the width is <8mm; the front part is an endotracheal tube, etc. The guide groove, width <15mm; starting from the right side, the top and outside open into an "L" shape, and gradually expand to the left top to become a "C" shape, that is, the outside is completely open, and the top gradually expands to the same width as the bottom and crosses the lens end Slightly extended, the upper and lower sides of the extended part are the same height as the semicircular part of the mirror body, and the inner and lower sides are closed. 5. As claimed in claim 1 and 2, the vertical distance between the left end of the semicircle of the lens and the upper distal point of the connection and the end of the inwardly folded extension is less than 40mm, and the distance between the perpendicular and the distal end of the extension is less than 30mm. 6. All sides and free surfaces of the lens are rounded and non-invasive. 7. The anatomical video laryngoscope is also characterized in that the imaging system with light source is made into a video device of the same type as the video device insertion groove, and the end is a handle that is centrifugal to the mirror body, and the video device as a whole is Spoon-shaped, the lens part can be inserted into the closed video camera lens insertion slot, and can be connected to the display with a cable or wirelessly.